Nozzle bar and method

Abstract

A jet manifold (10) and a method for a hydroentanglement device (1) are provided. The jet manifold (10) has a hollow housing (11) that includes a housing shell (12). An opening (13) is provided in the housing shell. A nozzle strip (16) is located in the housing (11) and has a tub-shaped cross-section with a nozzle body (19). The nozzle body (19) is recessed in the opening (13) in the housing shell.

The invention claimed is: 
     
       1. A nozzle bar for a hydroentanglement device, the nozzle bar being configured to emit water jets, the nozzle bar comprising:
 a hollow housing with a housing jacket and with a jacket opening; and 
 a nozzle strip arranged in the hollow housing, wherein the nozzle strip has a trough-shaped cross section with a nozzle body arranged retracted in the jacket opening, the nozzle body having an essentially V-shaped cross section with a side body wall and with a body bottom, in which nozzle orifices are arranged for a discharge of a water jet, the body bottom being arranged in an area of an external edge of the jacket opening, the jacket opening having a slot jacket opening and the jacket opening extending along a longitudinal axis of the housing, the jacket opening and the nozzle body having cross-sectional contours which correspond to one another, the cross-sectional contours being conical, wherein the side body wall and side walls of the jacket opening are in flat contact with one another. 
 
     
     
       2. A nozzle bar in accordance with  claim 1 , wherein the housing jacket has a conical configuration on an outside of the hollow housing. 
     
     
       3. A nozzle bar in accordance with  claim 1 , wherein:
 the nozzle strip has a retaining flange, arranged laterally on the nozzle body; and 
 the retaining flange is supported on the housing jacket next to the jacket opening. 
 
     
     
       4. A nozzle bar in accordance with  claim 1 , wherein:
 a perforated cover is arranged at an access opening of the nozzle body; and 
 a cross bracing is arranged in the nozzle body. 
 
     
     
       5. A nozzle bar in accordance with  claim 1 , wherein the side body wall of the nozzle is in contact with a lateral edge of the jacket opening and the nozzle body is supported via the lateral edge. 
     
     
       6. A nozzle bar in accordance with  claim 1 , wherein the nozzle body comprises an oblique front side body wall, the oblique front side body wall being in contact with a front-side edge of the jacket opening and the nozzle body being supported via the front-side edge. 
     
     
       7. A nozzle bar in accordance with  claim 1 , wherein at least one of the nozzle orifices has a conical shape in at least some areas in a longitudinal section. 
     
     
       8. A nozzle bar in accordance with  claim 1 , wherein at least a portion of the nozzle body extends from a position located in an interior space of the hollow housing to a position located external to the interior space of the hollow housing. 
     
     
       9. A hydroentanglement device, the device comprising:
 a nozzle bar with a hollow housing with a housing jacket and with a jacket opening, the nozzle bar being configured to emit water jets; and 
 a nozzle strip associated with the hollow housing, wherein the nozzle strip has a trough-shaped cross section with a nozzle body arranged in the jacket opening, the nozzle body having an essentially V-shaped cross section with a side body wall and with a body bottom, in which nozzle orifices are arranged for a discharge of the water jets, the body bottom being arranged in an area of an external edge of the jacket opening, the jacket opening having a slot jacket opening and the jacket opening extending along a longitudinal axis of the housing, the jacket opening and the nozzle body having cross-sectional contours which correspond to one another, the cross-sectional contours being conical, wherein the side body wall and side walls of the jacket opening are in flat contact with one another. 
 
     
     
       10. A hydroentanglement device in accordance with  claim 9 , further comprising a pressurized water supply. 
     
     
       11. A hydroentanglement device in accordance with  claim 9 , further comprising a carrier and a conveying device for a fibrous nonwoven web to be entangled. 
     
     
       12. A hydroentanglement device in accordance with  claim 9 , wherein:
 a carrier is configured permeable to fluids as a screen roller; 
 a suction device is arranged on a side of the carrier in an area of a nozzle bar. 
 
     
     
       13. A hydroentanglement device in accordance with  claim 9 , further comprising another nozzle bar to provide at least a plurality of nozzle bars, the plurality of nozzle bars being arranged distributed about a circumference of a cylindrical carrier. 
     
     
       14. A hydroentanglement device in accordance with  claim 13 , wherein one or more of the plurality of nozzle bars are arranged adjacent to a bottom of the carrier. 
     
     
       15. A hydroentanglement device in accordance with  claim 9 , wherein an adjusting device is arranged between the nozzle bar and a carrier for changing a distance and a free jet length of a fluid jet emitted. 
     
     
       16. A method for hydroentanglement, the method comprising:
 directing fluid jets toward a material web with a nozzle bar comprising a hollow housing with a housing jacket and with a jacket opening as well as with a nozzle strip arranged in the hollow housing, wherein the water jets are emitted by the nozzle strip, which has a trough-shaped cross section with a nozzle body that is arranged retracted in the jacket opening, the nozzle body having a V-shaped cross section with a side body wall and with a body bottom, in which nozzle orifices are arranged for a discharge of the water jets the body bottom being arranged in an area of an external edge of the jacket opening, the jacket opening having a slot jacket opening and the jacket opening extending along a longitudinal axis of the housing, the jacket opening and the nozzle body having cross-sectional contours which correspond to one another, the cross-sectional contours being conical, wherein the side body wall and side walls of the jacket opening are in flat contact with one another. 
 
     
     
       17. A method in accordance with  claim 16 , wherein the material web is supported on a perforated and rear-suctioned carrier. 
     
     
       18. A method in accordance with  claim 16 , wherein the nozzle bar is configured to emit the water jets against gravity vertically or obliquely upwards against the material web. 
     
     
       19. A nozzle bar for a hydroentanglement device, the nozzle bar comprising:
 a hollow housing with a housing jacket and with a jacket opening; and 
 a nozzle strip arranged in the hollow housing, wherein the nozzle strip has a trough-shaped cross section with a nozzle body arranged retracted in the jacket opening, wherein a portion of the nozzle body protrudes beyond an external hollow housing edge of the hollow housing, the external hollow housing edge defining at least a portion of the jacket opening, the external hollow housing edge being located at an outermost periphery of the hollow housing. 
 
     
     
       20. A nozzle bar in accordance with  claim 19 , the nozzle bar being configured to emit water jets, the hollow housing comprising a housing side wall defining at least a portion of a slot jacket opening extending along a longitudinal axis of the hollow housing, the nozzle body comprising a nozzle body side wall, the nozzle body side wall and the housing side wall comprising a cross-sectional conical contour, the nozzle body side wall being in planar contact with the housing side wall, the portion of the nozzle body comprising a nozzle body outlet for a flow of fluid, the nozzle body outlet being located at a position outside of the outermost periphery of the hollow housing.